High severity · published Dec 1, 2021
CVE-2021-20610
Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R…
7.5
CVSS
3.3%
EPSS
No
On KEV
Description
Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R Series R08/16/32/120SFCPU, MELSEC iQ-R Series R08/16/32/120PCPU, MELSEC iQ-R Series R08/16/32/120PSFCPU, MELSEC iQ-R Series R16/32/64MTCPU, MELSEC iQ-R Series R12CCPU-V, MELSEC Q Series Q03UDECPU, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU, MELSEC Q Series Q03/04/06/13/26UDVCPU, MELSEC Q Series Q04/06/13/26UDPVCPU, MELSEC Q Series Q12DCCPU-V, MELSEC Q Series Q24DHCCPU-V(G), MELSEC Q Series Q24/26DHCCPU-LS, MELSEC Q Series MR-MQ100, MELSEC Q Series Q172/173DCPU-S1, MELSEC Q Series Q172/173DSCPU, MELSEC Q Series Q170MCPU, MELSEC Q Series Q170MSCPU(-S1), MELSEC L Series L02/06/26CPU(-P), MELSEC L Series L26CPU-(P)BT and MELIPC Series MI5122-VW allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.3% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MQ
MELSEC Q Series MR-MQ100 · Mitsubishi Electric Corporation
Operating system software version "F" and prior · source: vendor
MQ
MELSEC Q Series Q03UDECPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23121" and prior · source: vendor
MQ
MELSEC Q Series Q03UDVCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23071" and prior · source: vendor
MQ
MELSEC Q Series Q04UDEHCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23121" and prior · source: vendor
MQ
MELSEC Q Series Q04UDPVCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23071" and prior · source: vendor
MQ
MELSEC Q Series Q04UDVCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23071" and prior · source: vendor
MQ
MELSEC Q Series Q06UDEHCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23121" and prior · source: vendor
MQ
MELSEC Q Series Q06UDPVCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23071" and prior · source: vendor
MQ
MELSEC Q Series Q06UDVCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23071" and prior · source: vendor
MQ
MELSEC Q Series Q100UDEHCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23121" and prior · source: vendor
MQ
MELSEC Q Series Q10UDEHCPU · Mitsubishi Electric Corporation
The first 5 digits of serial No. "23121" and prior · source: vendor
MQ
MELSEC Q Series Q12DCCPU-V · Mitsubishi Electric Corporation
The first 5 digits of serial No. "24031" and prior · source: vendor
Affected product
MI
MELSEC iQ-R Series R00CPU
Mitsubishi Electric Corporation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20610
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20610
Third Party Advisory
https://jvn.jp/vu/JVNVU94434051/index.html
Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02
Vendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdf
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